﻿/**
 * Copyright (C) 2013 original author and authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using NGuice.Inject.Spi;
using NGuice.Inject.Internal.Util;

namespace NGuice.Inject.Internal
{
    //complete!
    /// <summary>
    /// 用于收集注入器选项的处理器
    /// </summary>
    internal class InjectorOptionsProcessor : AbstractProcessor
    {
        private bool disableCircularProxies = false;
        private bool jitDisabled = false;

        internal InjectorOptionsProcessor(Errors errors)
            : base(errors)
        {
        }

        public override bool Visit(DisableCircularProxiesOption option)
        {
            disableCircularProxies = true;
            return true;
        }

        public override bool Visit(RequireExplicitBindingsOption option)
        {
            jitDisabled = true;
            return true;
        }

        internal Internal.InjectorImpl.InjectorOptions GetOptions(Stage stage, Internal.InjectorImpl.InjectorOptions parentOptions)
        {
            Preconditions.CheckNotNull(stage, "stage must be set");
            if (parentOptions == null)
            {
                return new Internal.InjectorImpl.InjectorOptions(
                    stage,
                    jitDisabled,
                    disableCircularProxies);
            }
            else
            {
                Preconditions.CheckState(stage == parentOptions.stage, "child & parent stage don't match");
                return new Internal.InjectorImpl.InjectorOptions(
                    stage,
                    jitDisabled || parentOptions.jitDisabled,
                    disableCircularProxies || parentOptions.disableCircularProxies);
            }
        }
    }
}
